Pinking mechanism



Nov. 10,1942. 2' v. J. SIGODA PINKING MECHANISM 2 Sheets-Sheet 1 Filed April 28, 1941 INVENTOR. V/c-rqR :1 5 :00.4 I M ATTORNEY.

Nov. 10, 1942. v, J. SIGODA 2,301,229

'PiNKINe MEGHANI sM Filed April 28, 1.941 2 Sheets-Sheet 2 INVENTOR. l/lc TOR d 5/ 6006 ATTORNEY.

Patented Nov. 10, 1942 as UNl'l ED dihiha h'ihhi'i" EFICE 2,eo1,229 I PINKING MECHANESM Victor J. Sig-oda, Great Neck, N. Y., assignor to Man-Sew Pinlring Attachment Corporation,

New York, N. Y., a corporation of New York Application Alp-H123; 1941, Serial No. 390,651

12 Giaims. (Cl. 164-64) This invention relates to pinking mechanism Fig. 1 is a side elevation partly in section, showand has for its general object and purpose to pro- 1 1g one embodiment of the D n g mechanism vide a simply constructed and inexpensive deas applied for use in connection with a sewing vice for ornamentally trimming or pinking the machine. edges of fabric materials and which is of such Fig. 2 is p plan View of the p n mechconstruction that it'may be readily applied to anism.

a standard sewing machine for operation in con- Fig. 3 is a sectional view taken on the line junction with the stitch forming mechanism, or 2-3 of Fig. 1. I

may be usedindependently thereof, Fig. 4 is a vertical sectional view on anch- It is a more particular object of the invention 10 larged scale illustrating the cooperative mountto provide a cutting or pinking member in the ing of the rotary pinking member'and the shear form of a multi-toothed element rotatable about pla e upon the bed of the machine.

a stationary axis and the teeth thereof having a 5 is a vertical. section substantially on cutting or chopping action upon the fabric mathe line 55 of Fig. l.

terial in cooperation with a shear plate mounted 13 F g. 6 is a detail plan-view of the shear plate.

on the machine base. Fig. 7 is a plan view showing a modified mount- In one embodiment of the invention, the roing of the rotary utter member.

tatable pinking member is mounted upon a cast- Fig. 8 is a sectional View taken substantially on ing attached to the machine base, said casting the line ii-3 of F g. '7. supporting operating means for th tt i 20 Fig. 9 is a plan view similar to Fig. 7 showing eluding a Worm gear engaged with a worm on a further modified construction, and, the needle operating shaft of a sewing machine, Fig. 10 is a vertical sectional View taken sub- 01 other suitable power driven shaft. stantially on the line lt! ii of Fig. 9.

Another object of the invention is to provide Referring first to Figs. 1 to 6 of the drawings, an imprgved mounting and arrangement of 1 9625 in which I have illustrated One embodiment 0f shear plate on the bed of the machine-whereby the pin i g mechanism mounted and arran d it is yieldingly urged into cooperative engageior use in connection witha sewing machine, 5 ment with the cutting edges of the teeth of the indicates the bed plate of the machine having the rotary cutter. In other embodiments of the inusual hollow pedestal 6 at one end thereof and vention, I propose to mount the rotary cutter or thehollow arm 7 extending horizonta y o e chopper with its aXis disposed in a horizontal upper end of said pedestal. The end of this arm plane which is substantially coincident with the is provided with the customary guide head 8 for plane of the upper surface of the bed plate of the vertically reciprocating needle bar and pressthe machine, or I may position said axis of the er foot operating mechanism (not shown). The cutting or trimming member at an oblique angle needle bar is operated by the power driven shaft intersecting the plane of the bed plate and with it extending through the arm 7. Of course, the the operating means for the cutter located wholly machine bed 5 is provided in its upper surface below said plate. with the usual throat plate it and feed dog The subject matter of the present application mechanism cooperating therewith to feed the fabis in part, a continuation of my pending appliric materials to the vertically reciprocating needle cation for patent Ser. No. 187,847, filed January H. 31, 1938, now Patent 2,239,743, granted April 29, The pinking mechanism is mounted upon a 1941. casting having a base portion l2 provided on With the above and other objects in View, the its bottom surface with the longitudinally extendinvention consists in the improved pinking mechins r bs 43 S y e ged in a channel l4 anism and in the form, construction and relative formed in the upper surface of the bed 5. The

arrangement of its several parts as will be herecasting is adjustably secured in fixed relation to inafter more fully described, illustrated in the the bed 5 by means of the threaded bolts or accompanying drawings and subsequently inscrews i5 engaged in slotsiS in the base porcorporated in the subjoined claims. '50 tion i2 of the casting.

In the drawings wherein I have illustrated sev- At one end the base portion i2 isformed with era] simple and practical embodiments of my insuitable bearing means I? for the shaft 18 to vention and in which similar reference characters which the rotary pinking member or cutter I9 designate corresponding parts throughout the suitably fixed. Adjacent one of its side edges several views: the base i 2 is formed with a vertically extending web integrally joined at its upper end with the obliquely inclined bearing sleeve 2| for a shaft 22. At its upper end the sleeve is formed with a yoke 23 in which a transverse shaft 24 is rotatably supported. This shaft carries the beveled gear 25 meshing with a similar gear 26 on the upper end of shaft 22. The lower end of said shaft is provided with the gear 21 in mesh with gear 28 fixed to one end of the cutter shaft [8.

One end of the shaft 2 5 is provided with the worm gear 29 which, in the illustrated arrangement, is adapted to extend upwardly through a slot 3!] in the lower side of the machine arm 1 to mesh with the teeth of the worm 3i fixed to the power driven shaft 9.

The inner sides of the ribs E3 on the base l2 are grooved as at 32 to receive the longitudinal edge portions of slidable shear plate 315. This plate has a relatively wide end portion 3d movable in a recess in the upper surface of the throat plate It) and providing stop shoulders 35 for abutting contact with the base R2 to limit movement of the shear plate to a normal position. The plate is yieldingly held in such normal position by the spring 36 attached at one of its ends to a pin 31 fixed to the shear plate and movable in the slot 38 in the base l2. The other end of said spring is attached to the adjustable screw 39 mounted on the base, whereby the resistance offered by said spring to sliding movement of the shear plate may be varied.

The shear plate 33 is provided with an elongated opening 40 registering with a similar opening 4! in the machine bed 5 to receive the teeth of the cutter l9. At one end of the opening it, the converging cutting edges 42 are provided to coact with the cutting edges 43 of the individual teeth of the cutter E9 so as to produce a triangularly shaped pinking out. It will be evident that the spring 35 yieldingly urges the edges 42 of the shear plate towards the cutting edges of the teeth of the cutter i9, and depending upon the thickness of the material, there will be a slight longitudinal yielding motion of the shear plate. This insures a sharp shearing cut, and uniform depth of the pinking cuts.

From the above description, the operation of this embodiment of the invention will be readily understood. As the sewing machine is operated, rotation is transmitted to the cutter l9 through the worm gearing and the shafts 2- 1 and 22. The pinking device is adjusted on the bed 5 so as to position the cutter in predetermined relation to the edge of the material fed to the sewing machine needle ll. The path of rotation of; the cutter is at right angles to the edge of the material so that the individual cutter teeth in cooperation with the shear plate 33 have a chopping action. The cutter teeth are so spaced, and its speed of rotation is properly predetermined relative to the action of the feed mechanism so that the V-shaped pinking cuts are produced in regular succession in the edge of the fabric. By

adjusting the pinking device on the bed plate 5, the depth of the pinking cuts and their spaced relation from the line of stitching may be regulated as desired.

In Figs. 7 and 8 of the drawings I have shown a modified construction, in which the cutter shaft i8 is mounted with its axis disposed substantially coincident with the plane of the upper surface of the machine bed. As illustrated, I show said cutter shaft supported in a suitable bearing. 43 formed on. the throat plate id. In

this case, the cutter l9 fixed to said shaft has a relatively large number of teeth, each of which has its cutting edges Ida disposed in a common plane which intersects the axis of the shaft :8. The cutter I9 is operable through an opening in the throat plate and at one end thereof the shear plate 33' is counter-sunk in the upper surface of the throat plate and adjustable with relation to the teeth of the cutter H! by the screws 44 threaded in the throat plate and extending through slots in the shear plate. This shear plate is provided with the cutting edges t2 which correspond with the shape or form of the teeth of cutter l9, One end of the shaft [8' is provided with a worm 45 for connection with any suitable driving means mounted upon the machine bed.

In Figs. 9 and 10, I have illustrated another alternative construction in which all of the operating gearing for the cutter is mounted wholly beneath the bed plate of the machine while at the same time a minimum of projection of said outter above the surface of the bed plate is obtained In this case the axis of the cutter shaft 45 is disposed at an angle of substantially 30 with respect to the plane of said plate, and, as herein shown, is journaled in a suitable bearing 51 on the under side of the throat plate. One end of said shaft intersects the plane of the throat plate and to the same the cutter 48 is suitably fixed. This cutter is provided with a plurality of spaced triangularly shaped cutting teeth 69 which are spirally arranged upon the periphery of the cutter so that their cutting edge 59 are respectively positioned in a plane intersecting the axis of the cutter and shaft 46 at an oblique angle. Therefore, as the teeth 49 successively approach the shear plate and engage the fabric, they will be disposed with their cutting edges in a horizontal plane to properly cooperate with the cutting edges of the shear plate and thus insure a clean sharp pinking cut.

Upon the lower end of the obliquely inclined cutter shaft 46 a gear 5! is fixed and in constant mesh with a similar gear 52 on one end of the cutter drive shaft 53. It will thus be seen that the major portion of the cutter shaft 4 5, the drive gearing therefor and one-half of the cutter 458 are disposed entirely below the plane of the upper surface of the bed plate of the machine so that a very minimum of obstructive parts to the vision or movement of the workers hands in guiding or directing the work is made possible.

In each of the above described embodiments of the invention, it will be understood that the cutter elements may be of any desired size or diameter and provided with a greater or less number of cutting teeth than illustrated in the drawings. t will also be seen that said pinking mechanisms are readily adaptable to use in connection with a standard sewing machine so that two or more plies of fabric may be stitched together and simultaneously pinked, or the said mechanism may be independently employed to pink the edges of the fabric plies before or after the sewing or stitching operation. In the latter case, it will, of course, be evident that the use of the throat plate may be dispensed with and the shear plate mounted directly on the machine bed. Also, while I have herein referred to several practical embodiments of my improved pinking mechanism and described the same in more or less detail, the essential features of the invention may also be incorporated in various other structural forms and other relative arrangements of the several cooperating elements, without materially affecting the functional operation and advantageous results of the mechanism as herein described. Accordingly, it is to be understood that I reserve the privilege of adopting all such legitimate changes in the form, construction and relative arrangement of the various parts as may fairly be considered to be within the spirit and scope of the appended claims.

I claim:

1. In mechanism for edge-pinking fabrics, at multi-toothed cutter mounted to rotate in a vertical plane with the teeth thereof movable in a path which intersects the plane of the fabric at an angle of substantially 90.

2. In mechanism for edge-pinking fabrics, a multi-toothed cutter mounted to rotate in a vertical plane with the teeth thereof movable in a path which intersects the plane of the fabric at an angle of substantially 90, and a shear member yieldably coacting with the cutting edges of the teeth of said rotatable cutter.

3. In mechanism for edge-pinking fabrics, a multi-toothed cutter mounted to rotate in a vertical plane with the teeth thereof movable in a path which intersects the plane of the fabric at an angle of substantially 90, a movable shear plate having an opening receiving the cutter teeth and provided with cutting edges at one end of said opening to coact with the cutting edges of said teeth, and means yieldingly resisting relative movement of the shear plate and urging the cutting edges thereof into coacting relation with the teeth of the rotatable cutter.

4. In mechanism for edge-pinking fabrics, a supporting base, a multi-toothed cutter rotatably mounted on said base in intersecting relation thereto and with the cutting teeth movable in a vertical plane which intersects the plane of the fabric at an angle of substantially 90, and drive means for the cutter mounted on said base including a driven element adapted for operative connection with a power driven member.

5. In mechanism for edge-pinking fabrics, in combination with a bed plate over which the fabric moves in a rectilinear path, a supporting structure, means for adjustably mounting said structure on the bed plate for movement towards and from the path of movement of the fabric, a multi-toothed cutter mounted upon said supporting structure to rotate in a vertical plane with the teeth thereof movable in a path which intersects the plane of the bed plate and the edge of the fabric at an angle of substantially 90, drive means for the cutter mounted upon said supporting structure and including a worm gear, and a power driven worm in mesh with said worm gear.

6. In mechanism for edge-pinking fabrics, a supporting base over which the fabric is adapted to be moved in a rectilinear path, a cutter shaft and means for mounting said shaft upon said base, and a toothed cutter fixed to said shaft having spaced teeth movable in a path at an intersecting angle relative to the path of movement of the edge of the fabric.

'7. In mechanism for edge-pinking fabrics, a supporting base over which the fabric is adapted to be moved in a rectilinear path, a cutter shaft and means for mounting said shaft on the base with its axis substantially coincident with the plane of the upper surface of the base, and a toothed cutter fixed to said shaft having spaced teeth movable in a path which intersects the edge of the fabric at an angle of substantially with respect thereto.

8. In mechanism for edge-pinking fabrics, a supporting base over which the fabric is adapted to be moved in a rectilinear path, a cutter shaft and means for mounting said .shaft upon said base, and a toothed cutter fixed to said shaft having spaced teeth movable in a path at an intersecting angle relative to the path of movement of the edge of the fabric, each of the cutter teeth having spaced cutting edges disposed in a common plane intersecting the axis of the cutter shaft.

9. In mechanism for edge-pinking fabrics, a base, a multi-toothed cutter mounted upon said base for rotation about an obliquely inclined axis and in intersecting relation to the plane of said base, the teeth of said cutter each having cutting edges disposed in a plane obliquely intersecting the axis of rotation of the cutter.

10. A rotatable cutter for fabric trimming devices having circumferentially' spaced cutting teeth each provided with a plurality of cutting edges disposed in a plane intersecting the axis of the cutter at an angle thereto.

11. A rotatable cutter for fabric trimming devices having circumferentially spaced cutting teeth spirally inclined relative to the cutter axis.

12. A rotatable cutter for fabric trimming devices having circumferentially spaced cutting teeth spirally inclined relative to the cutter axis, and each tooth having spaced cutting edges disposed in a common plane obliquely intersecting the cutter axis.

VICTOR J. SIGODA. 

